CN112591029A - Linear design method for adjusting high-speed ship floating state - Google Patents
Linear design method for adjusting high-speed ship floating state Download PDFInfo
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- CN112591029A CN112591029A CN202011362973.1A CN202011362973A CN112591029A CN 112591029 A CN112591029 A CN 112591029A CN 202011362973 A CN202011362973 A CN 202011362973A CN 112591029 A CN112591029 A CN 112591029A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/10—Designing vessels; Predicting their performance using computer simulation, e.g. finite element method [FEM] or computational fluid dynamics [CFD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The invention particularly discloses a line type design method for adjusting the floating state of a high-speed ship, which comprises the steps of constructing 3D ship models of different stern bottom plate line types, inputting environmental parameters to a calculation module of each 3D ship model to obtain a longitudinal inclination angle and corresponding resistance corresponding to each stern bottom plate line type, and selecting the optimal stern bottom plate line type according to the longitudinal inclination angle and the resistance; the ship longitudinal inclination angle is changed, so that the resistance borne by the ship is reduced, the field construction workload is reduced, the conventional ship accessories are reduced, and the maintenance work and maintenance cost of the ship are reduced.
Description
Technical Field
The invention relates to the field of ships, in particular to a linear design method for adjusting the floating state of a high-speed ship.
Background
No matter the ship is a single high-speed ship or a multi-body high-speed ship, if the optimal speed needs to be obtained, the maximum speed economic benefit is realized, and besides the normal design and light weight, the floating state of the ship needs to be adjusted in a certain mode, so that the resistance of the ship is reduced to the minimum. The main reason is that under the same displacement and different ship trim angles, the wet areas of the ships contacting with water are different, and the resistance is also different, which is the most critical factor. That is, on the premise that the displacement of the ship is the same, the pitch angle of the ship needs to be controlled in a specific mode, so that the resistance of the ship contacting water is reduced as much as possible, and the optimal performance is achieved. At present, the trim angle of a ship is adjusted in the form of ballast, a stern cut-off plate, a corrugated plate, etc., but these methods increase the amount of water to be discharged or increase the on-body resistance to some extent.
Since the high-speed ship is very sensitive to the displacement and the attached body resistance, the high-speed ship is relatively simple in ballast, cut-off plates, corrugated plates and the like, but cannot avoid the negative influence of the resistance of other aspects of the ship. If the ship has similar capacity by only modifying the line type of the ship, the negative factors can be avoided, and the economy of the ship is improved.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a linear design method for adjusting the floating state of a high-speed ship, so that the longitudinal inclination angle of the ship is changed, the resistance borne by the ship is reduced, the field construction workload is reduced, the conventional ship accessories are reduced, and the maintenance work and maintenance cost of the ship are reduced.
The above problems to be solved by the present invention are achieved by the following technical solutions:
a line type design method for adjusting the floating state of a high-speed ship is characterized by constructing 3D ship models of different stern bottom plate line types, inputting environmental parameters to a calculation module of each 3D ship model to obtain a longitudinal inclination angle and a corresponding resistance corresponding to each stern bottom plate line type, and selecting the optimal stern bottom plate line type according to the longitudinal inclination angle and the resistance.
Further, the method comprises the steps of:
s1: constructing an original 3D ship model according to the main scale parameters of the ship;
s2: importing the 3D ship model into a calculation module, and inputting environmental parameters of the 3D ship model to obtain an original trim angle and corresponding resistance of the ship in the current operation state;
s3: modifying the stern baseplate line type of the 3D ship model, reapplying the line type in the calculation module to obtain the trim angle and the resistance corresponding to the ship after the stern baseplate line type is modified, and repeating the steps to obtain a series of stern baseplate line types and the trim angle and the resistance corresponding to the stern baseplate line types;
s4: and selecting the optimal stern baseboard line type.
Further, the calculation module divides the 3D ship model and the operation water body of the ship into N three-dimensional grid nodes, gives corresponding initial attributes to each grid node according to the environmental parameters, applies a computational fluid mechanics method, and performs iterative calculation by using a computer to obtain the original trim angle and the corresponding resistance of the ship in the current operation state.
Further, the main scale parameters of the ship comprise the length of a water line of the ship, the width of the ship, the design draught, the weight gravity center of an empty ship, the corresponding navigation state, the operation loading data, the ship navigation speed, the windage area of an upper building of the ship and the water displacement of the ship.
Further, the environmental parameters are set according to the operating environmental conditions of the ship, including the self-attributes and motion attributes of water, gas and solids.
Further, the ratio of the 3D ship model to the solid ship is 1: 1.
Further, the current operation state is a state of a normal operation load.
Further, the stern baseboard linetype in the step S3 is adjusted and modified according to the data value of the trim angle, and other ship parameters and environmental parameters are not changed.
Has the advantages that: the method for adjusting the line type design method of the high-speed ship floating state comprises the steps of firstly obtaining a series of ship design schemes with different trim angles and corresponding resistance by modifying the line type of the stern baseplate, then selecting the optimal line type design scheme of the stern baseplate line type, and shaping and implementing, thereby not only changing the trim angle of the ship to reduce the resistance borne by the ship, but also reducing the field construction workload, reducing the conventional ship accessories and reducing the maintenance work and maintenance cost of the ship.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited to these examples in any way.
Example 1:
a line type design method for adjusting the floating state of a high-speed ship is characterized by constructing 3D ship models of different stern bottom plate line types, inputting environmental parameters to a calculation module of each 3D ship model to obtain a longitudinal inclination angle and a corresponding resistance corresponding to each stern bottom plate line type, and selecting the optimal stern bottom plate line type according to the longitudinal inclination angle and the resistance; the ship trim angle is changed to reduce the resistance of the ship, the field construction workload is reduced, the conventional ship accessories are reduced, the maintenance work and the maintenance cost of the ship are reduced, and the economy of the ship is improved; equipment for adjusting the pitch angle is saved, so that the equipment cost is saved, and the energy consumption in the using process of the equipment is also saved; the environment is protected and no pollution is caused; the implementation process can be synchronously carried out with the shipbuilding process, no special articles are needed to be added, and the environment is not polluted; the implementation material cost is low; the same material of the ship is used and is completely integrated into the ship construction process, and maintenance is not needed after installation.
The method comprises the following steps:
s1: constructing an original 3D ship model according to the main scale parameters of the ship;
s2: importing the 3D ship model into a calculation module, and inputting environmental parameters of the 3D ship model to obtain an original trim angle and corresponding resistance of the ship in the current operation state;
s3: modifying the stern baseplate line type of the 3D ship model, reapplying the line type in the calculation module to obtain the trim angle and the resistance corresponding to the ship after the stern baseplate line type is modified, and repeating the steps to obtain a series of stern baseplate line types and the trim angle and the resistance corresponding to the stern baseplate line types;
s4: selecting an optimal stern bottom plate line type;
the trim angle of the ship is changed to reduce the resistance of the ship, the field construction workload is reduced, the conventional ship accessories are reduced, and the maintenance work and the maintenance cost of the ship are reduced; the economy of the ship is improved; equipment for adjusting the pitch angle is saved, so that the equipment cost is saved, and the energy consumption in the using process of the equipment is also saved; the environment is protected and no pollution is caused; the implementation process can be synchronously carried out with the shipbuilding process, no special articles are needed to be added, and the environment is not polluted; the implementation material cost is low; the same material of the ship is used and is completely integrated into the ship construction process, and maintenance is not needed after installation.
The calculation module divides a 3D ship model and an operation water body of a ship into N three-dimensional grid nodes, endows each grid node with corresponding initial attributes according to environmental parameters, applies a computational fluid mechanics method, and performs iterative calculation by using a computer to obtain an original trim angle and corresponding resistance of the ship in a current operation state, wherein the value of N is 200 ten thousand or 300 ten thousand.
The main scale parameters of the ship comprise the water line length, the profile width, the design draft, the empty weight gravity center of the ship, the corresponding navigation state, the operation loading data, the ship navigation speed, the windward area of the superstructure of the ship and the water displacement of the ship, and the main scale parameters are used for constructing a 3D ship model similar to an entity ship and avoiding generating data errors.
The environment parameters are set according to the operation environment conditions of the ship, the operation environment conditions comprise the self attributes and motion attributes of water, gas and solid, the 3D ship model construction and real environment factors are provided, and the data accuracy is improved.
The ratio of the 3D ship model to the solid ship is 1:1, so that the conversion steps are reduced, and the accuracy and convenience of ship construction are ensured.
The current operation state is a state of common operation loading, and influence factors are reduced.
And the stern baseboard linetype in the step S3 correspondingly adjusts and modifies the broadside linetype according to the data numerical value of the longitudinal inclination angle, and other ship parameters and environmental parameters are unchanged, so that the iterative operation of a single variable is ensured, and the operation is convenient.
The working principle is as follows:
determining the water line length, the shape width, the design draft, the empty weight gravity center of the ship, the corresponding navigation state, the operation loading data, the ship navigation speed, the windage area of the superstructure of the ship and the parameter values of the main parameters of the ship of the displacement of the ship, creating a 3D ship model which is equal to the structure proportion of the entity ship according to the main scale parameters of the ship, carrying out three-dimensional gridding on the 3D ship model and the operation water body, giving the corresponding operation environment parameters of each grid node, applying a method for calculating hydromechanics in a calculation module, carrying out iterative operation on each grid node by using the calculation module to obtain the original longitudinal inclination angle and the corresponding resistance of the ship in the current operation state, and carrying out iterative operation by modifying the stern bottom plate line type of the 3D ship model to obtain a series of stern bottom plate line types and the corresponding longitudinal inclination angle, Resistance, further selecting the optimal line type design of the stern bottom plate line type, and finally shaping and implementing the stern bottom plate line type of the new ship;
the line type of the stern bottom plate of the ship is adjusted, so that water flow generates a rotating moment which enables the stern part of the ship to rise and the bow part of the ship to sink at the stern part of the ship, the trim angle of the ship is adjusted, the trim angle of the ship is changed, the resistance of the ship is reduced, the effects of improving the navigational speed performance of the ship and reducing oil consumption are achieved, and the economy of the ship is improved; equipment for adjusting the pitch angle is saved, so that the equipment cost is saved, and the energy consumption in the using process of the equipment is also saved; the environment is protected and no pollution is caused; the implementation process can be synchronously carried out with the shipbuilding process, no special articles are needed to be added, and the environment is not polluted; the implementation material cost is low; the same material of the ship is used and is completely integrated into the ship construction process, and maintenance is not needed after installation.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A line type design method for adjusting the floating state of a high-speed ship is characterized by constructing 3D ship models of different stern bottom plate line types, inputting environmental parameters to a calculation module of each 3D ship model to obtain a longitudinal inclination angle and corresponding resistance corresponding to each stern bottom plate line type, and selecting the optimal stern bottom plate line type according to the longitudinal inclination angle and the resistance.
2. The line design method for adjusting the buoyancy of a high speed vessel according to claim 1, comprising the steps of:
s1: constructing an original 3D ship model according to the main scale parameters of the ship;
s2: importing the 3D ship model into a calculation module, and inputting environmental parameters of the 3D ship model to obtain an original trim angle and corresponding resistance of the ship in the current operation state;
s3: modifying the stern baseplate line type of the 3D ship model, reapplying the line type in the calculation module to obtain the trim angle and the resistance corresponding to the ship after the stern baseplate line type is modified, and repeating the steps to obtain a series of stern baseplate line types and the trim angle and the resistance corresponding to the stern baseplate line types;
s4: and selecting the optimal stern baseboard line type.
3. The linear design method for adjusting the floating state of the high-speed ship according to claim 2, wherein the calculation module divides the 3D ship model and the operating water body of the ship into N three-dimensional grid nodes, gives corresponding initial attributes to each grid node according to environmental parameters, applies a computational fluid dynamics method, and performs iterative calculation by using a computer to obtain an original trim angle and corresponding resistance of the ship in the current operating state.
4. The line type design method for adjusting the floating state of the high-speed ship according to claim 2, wherein the main scale parameters of the ship comprise the length of a water line of the ship, the profile, the design draft, the empty weight gravity center and the corresponding navigational state, the operation loading data, the navigational speed of the ship, the windage area of the superstructure of the ship and the displacement of the ship.
5. The line type design method for adjusting the floating state of the high-speed ship according to claim 1, wherein the environmental parameters are set according to the operating environmental conditions of the ship, and the operating environmental conditions comprise the self-properties of water, gas and solid and the motion properties.
6. The line type design method for adjusting the floating state of the high-speed ship according to claim 1, wherein the ratio of the 3D ship model to the physical ship is 1: 1.
7. The line type design method for adjusting the floating state of the high-speed ship according to claim 2, wherein the current operation state is a normal operation loading state.
8. The method as claimed in claim 2, wherein the stern sill line of step S3 is modified according to the trim angle data, and other ship parameters and environmental parameters are not changed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115042933A (en) * | 2022-04-27 | 2022-09-13 | 广船国际有限公司 | Method, device, equipment and medium for outputting ship stability parameters |
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| WO2016102497A1 (en) * | 2014-12-22 | 2016-06-30 | Rasmussen Maritime Design As | Design of forepart of a vessel |
| CN107813902A (en) * | 2017-10-31 | 2018-03-20 | 青岛科技大学 | Wutai rock group overall performance optimization design method |
| CN110110351A (en) * | 2019-03-20 | 2019-08-09 | 浙江海洋大学 | A kind of method for numerical simulation of ship trim optimization |
| KR20200024545A (en) * | 2018-08-28 | 2020-03-09 | 주식회사 유시스 | 3D model viewer system for verification of shipyard design |
| CN111674524A (en) * | 2020-06-08 | 2020-09-18 | 大连理工大学 | Bottom-up molded line layered design method for ballastless water ship |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102158738B1 (en) * | 2019-02-19 | 2020-09-22 | 한국해양과학기술원 | Method for estimating ship resistance performance using regression analysis |
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Patent Citations (6)
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|---|---|---|---|---|
| KR20010001031U (en) * | 1999-06-23 | 2001-01-15 | 노선예 | Pipe joint of "l"type |
| WO2016102497A1 (en) * | 2014-12-22 | 2016-06-30 | Rasmussen Maritime Design As | Design of forepart of a vessel |
| CN107813902A (en) * | 2017-10-31 | 2018-03-20 | 青岛科技大学 | Wutai rock group overall performance optimization design method |
| KR20200024545A (en) * | 2018-08-28 | 2020-03-09 | 주식회사 유시스 | 3D model viewer system for verification of shipyard design |
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| CN111674524A (en) * | 2020-06-08 | 2020-09-18 | 大连理工大学 | Bottom-up molded line layered design method for ballastless water ship |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115042933A (en) * | 2022-04-27 | 2022-09-13 | 广船国际有限公司 | Method, device, equipment and medium for outputting ship stability parameters |
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